1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2014, 2020 Intel Corporation. All rights reserved.
9 * Copyright(c) 2016 Intel Deutschland GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * The full GNU General Public License is included in this distribution
21 * in the file called COPYING.
22 *
23 * Contact Information:
24 * Intel Linux Wireless <linuxwifi@intel.com>
25 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26 *
27 * BSD LICENSE
28 *
29 * Copyright(c) 2012 - 2014, 2020 Intel Corporation. All rights reserved.
30 * Copyright(c) 2016 Intel Deutschland GmbH
31 * All rights reserved.
32 *
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
35 * are met:
36 *
37 * * Redistributions of source code must retain the above copyright
38 * notice, this list of conditions and the following disclaimer.
39 * * Redistributions in binary form must reproduce the above copyright
40 * notice, this list of conditions and the following disclaimer in
41 * the documentation and/or other materials provided with the
42 * distribution.
43 * * Neither the name Intel Corporation nor the names of its
44 * contributors may be used to endorse or promote products derived
45 * from this software without specific prior written permission.
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
48 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
49 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
50 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
51 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
52 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
53 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
54 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
55 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
56 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
57 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
58 *
59 *****************************************************************************/
60
61 #include <net/mac80211.h>
62 #include "fw-api.h"
63 #include "mvm.h"
64
65 struct iwl_mvm_iface_iterator_data {
66 struct ieee80211_vif *ignore_vif;
67 int idx;
68
69 struct iwl_mvm_phy_ctxt *phyctxt;
70
71 u16 ids[MAX_MACS_IN_BINDING];
72 u16 colors[MAX_MACS_IN_BINDING];
73 };
74
iwl_mvm_binding_cmd(struct iwl_mvm * mvm,u32 action,struct iwl_mvm_iface_iterator_data * data)75 static int iwl_mvm_binding_cmd(struct iwl_mvm *mvm, u32 action,
76 struct iwl_mvm_iface_iterator_data *data)
77 {
78 struct iwl_binding_cmd cmd;
79 struct iwl_mvm_phy_ctxt *phyctxt = data->phyctxt;
80 int i, ret;
81 u32 status;
82 int size;
83
84 memset(&cmd, 0, sizeof(cmd));
85
86 if (fw_has_capa(&mvm->fw->ucode_capa,
87 IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT)) {
88 size = sizeof(cmd);
89 cmd.lmac_id = cpu_to_le32(iwl_mvm_get_lmac_id(mvm->fw,
90 phyctxt->channel->band));
91 } else {
92 size = IWL_BINDING_CMD_SIZE_V1;
93 }
94
95 cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(phyctxt->id,
96 phyctxt->color));
97 cmd.action = cpu_to_le32(action);
98 cmd.phy = cpu_to_le32(FW_CMD_ID_AND_COLOR(phyctxt->id,
99 phyctxt->color));
100
101 for (i = 0; i < MAX_MACS_IN_BINDING; i++)
102 cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
103 for (i = 0; i < data->idx; i++)
104 cmd.macs[i] = cpu_to_le32(FW_CMD_ID_AND_COLOR(data->ids[i],
105 data->colors[i]));
106
107 status = 0;
108 ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
109 size, &cmd, &status);
110 if (ret) {
111 IWL_ERR(mvm, "Failed to send binding (action:%d): %d\n",
112 action, ret);
113 return ret;
114 }
115
116 if (status) {
117 IWL_ERR(mvm, "Binding command failed: %u\n", status);
118 ret = -EIO;
119 }
120
121 return ret;
122 }
123
iwl_mvm_iface_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)124 static void iwl_mvm_iface_iterator(void *_data, u8 *mac,
125 struct ieee80211_vif *vif)
126 {
127 struct iwl_mvm_iface_iterator_data *data = _data;
128 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
129
130 if (vif == data->ignore_vif)
131 return;
132
133 if (mvmvif->phy_ctxt != data->phyctxt)
134 return;
135
136 if (WARN_ON_ONCE(data->idx >= MAX_MACS_IN_BINDING))
137 return;
138
139 data->ids[data->idx] = mvmvif->id;
140 data->colors[data->idx] = mvmvif->color;
141 data->idx++;
142 }
143
iwl_mvm_binding_update(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_phy_ctxt * phyctxt,bool add)144 static int iwl_mvm_binding_update(struct iwl_mvm *mvm,
145 struct ieee80211_vif *vif,
146 struct iwl_mvm_phy_ctxt *phyctxt,
147 bool add)
148 {
149 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
150 struct iwl_mvm_iface_iterator_data data = {
151 .ignore_vif = vif,
152 .phyctxt = phyctxt,
153 };
154 u32 action = FW_CTXT_ACTION_MODIFY;
155
156 lockdep_assert_held(&mvm->mutex);
157
158 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
159 IEEE80211_IFACE_ITER_NORMAL,
160 iwl_mvm_iface_iterator,
161 &data);
162
163 /*
164 * If there are no other interfaces yet we
165 * need to create a new binding.
166 */
167 if (data.idx == 0) {
168 if (add)
169 action = FW_CTXT_ACTION_ADD;
170 else
171 action = FW_CTXT_ACTION_REMOVE;
172 }
173
174 if (add) {
175 if (WARN_ON_ONCE(data.idx >= MAX_MACS_IN_BINDING))
176 return -EINVAL;
177
178 data.ids[data.idx] = mvmvif->id;
179 data.colors[data.idx] = mvmvif->color;
180 data.idx++;
181 }
182
183 return iwl_mvm_binding_cmd(mvm, action, &data);
184 }
185
iwl_mvm_binding_add_vif(struct iwl_mvm * mvm,struct ieee80211_vif * vif)186 int iwl_mvm_binding_add_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
187 {
188 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
189
190 if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
191 return -EINVAL;
192
193 /*
194 * Update SF - Disable if needed. if this fails, SF might still be on
195 * while many macs are bound, which is forbidden - so fail the binding.
196 */
197 if (iwl_mvm_sf_update(mvm, vif, false))
198 return -EINVAL;
199
200 return iwl_mvm_binding_update(mvm, vif, mvmvif->phy_ctxt, true);
201 }
202
iwl_mvm_binding_remove_vif(struct iwl_mvm * mvm,struct ieee80211_vif * vif)203 int iwl_mvm_binding_remove_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
204 {
205 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
206 int ret;
207
208 if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
209 return -EINVAL;
210
211 ret = iwl_mvm_binding_update(mvm, vif, mvmvif->phy_ctxt, false);
212
213 if (!ret)
214 if (iwl_mvm_sf_update(mvm, vif, true))
215 IWL_ERR(mvm, "Failed to update SF state\n");
216
217 return ret;
218 }
219